file uploader

1 files changed, 44 insertions, 0 deletions

diff --git a/app/models/generic_file.rb b/app/models/generic_file.rb
new file mode 100644
index 0000000..b6b3ede
--- /dev/null
+++ b/app/models/generic_file.rb
@@ -0,0 +1,44 @@
+class GenericFile < ActiveRecord::Base
+  FILE_TYPES = %w(pdf ps jpg gif png tif wav mp3)
+  CATEGORIES = %w(file document image greeting recording)
+
+  attr_accessible :name, :file, :file_type, :category, :owner_id, :owner_type
+
+  mount_uploader :file, GenericFileUploader
+
+  belongs_to :owner, :polymorphic => true
+
+  before_save :determine_file_type
+
+  def store_dir
+    "/var/opt/gemeinschaft/generic_files/#{self.id.to_i}"
+  end
+
+  def mime_type
+    return GenericFile.mime_type(self.file.to_s)
+  end
+
+  def self.mime_type(file_name)
+    mime_type = `file -b --mime-type "#{file_name}"`.strip
+    if mime_type.blank?
+      mime_type = MIME::Types.type_for(file_name).first.to_s
+    end
+
+    return mime_type
+  end
+
+  def file_size
+    if self.file
+      return File.size(self.file.to_s)
+    else
+      return 0
+    end
+  end
+
+  private
+  def determine_file_type
+    if self.file_changed?
+      self.file_type = self.mime_type
+    end
+  end
+end